AAU-ETD AAU-ETD
 

Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
Faculty of Technology >
Thesis - Civil Engineering >

Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2262

Title: A STUDY ON THE INFLUENCE OF SOIL FLEXIBILITY ON THE INTERNAL FORCE DISTRIBUTION OF BUILDINGS SUBJECTED TO LATERAL STATIC LOADS
Authors: Gashaye, Amsalu
Advisors: Dr. - Ing. Asrat Worku
Keywords: Civil Engineering.
Copyright: Jan-2005
Date Added: 3-May-2012
Publisher: AAU
Abstract: This work deals with the investigation of the influence of soil flexibility on the internal force distributions of buildings subjected to lateral static loads. The soil flexibility, which usually is neglected in the conventional analysis of buildings subjected to static lateral loads, has been accounted for by introducing static elastic springs. Three structural systems have been considered. They include Structural system 1 representing framed buildings and Structural Systems 2 and 3 representing dual (frame-wall) systems. They have been selected in such a manner that their properties fall within the range of applicability of the pseudo- static method of analysis for lateral loads. Comparison was made between the internal force distributions of the fixed-base structural system and the flexible-base structural system as obtained using the structural analysis software-ETABS. The flexible-base system has been modeled to account for the flexibility of the soil with all the influencing parameters like the foundation shape and type, embedment depth and soil types. For the structural systems studied, it was found that the soil flexibility has resulted in a significance difference in internal force distribution specially in the bending moments around the supports of end spans of beams, where the designs moments are already large in the conventional analysis. In the dual systems, accounting for the flexibility of the soil has resulted in differences of bending moments, shear forces and axial forces in the shear walls. Generally, the influence has been found to be more pronounced in the dual systems. This observation has a direct practical significance in that dual systems are the common types of structural systems employed in buildings susceptible to lateral load effects
URI: http://hdl.handle.net/123456789/2262
Appears in:Thesis - Civil Engineering

Files in This Item:

File Description SizeFormat
1331357635742079069866004497207563197422.3 MBAdobe PDFView/Open

Items in the AAUL Digital Library are protected by copyright, with all rights reserved, unless otherwise indicated.

 

  Last updated: May 2010. Copyright © Addis Ababa University Libraries - Feedback